All of lore.kernel.org
 help / color / mirror / Atom feed
From: Harish <harish@linux.ibm.com>
To: Michal Suchanek <msuchanek@suse.de>, linux-nvdimm@lists.01.org
Cc: jack@suse.de
Subject: Re: [PATCH] ndctl/namespace: skip zero namespaces when processing
Date: Mon, 6 Apr 2020 17:11:36 +0530	[thread overview]
Message-ID: <1fda4cb0-3ca7-3701-a2ad-fc99cec0432d@linux.ibm.com> (raw)
In-Reply-To: <20200403210514.21786-1-msuchanek@suse.de>

Tested-by: Harish Sriram <harish@linux.ibm.com>


On 4/4/20 2:35 AM, Michal Suchanek wrote:
> Hello,
>
> this is a fix for github issue #41. I tested on system with vpmem with
> ndctl 64.1 that the issue is fixed. master builds with the fix applied.
>
> 8<-------------------------------------------------------------------->8
>
> The kernel always creates zero length namespace with uuid 0 in each
> region.
>
> When processing all namespaces the user gets confusing errors from ndctl
> trying to process this namespace. Skip it.
>
> The user can still specify the namespace by name directly in case
> processing it is desirable.
>
> Fixes: #41
>
> Signed-off-by: Michal Suchanek <msuchanek@suse.de>
> ---
>   ndctl/namespace.c | 16 +++++++++++++---
>   1 file changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/ndctl/namespace.c b/ndctl/namespace.c
> index 0550580707e8..6f4a4b5b8883 100644
> --- a/ndctl/namespace.c
> +++ b/ndctl/namespace.c
> @@ -2128,9 +2128,19 @@ static int do_xaction_namespace(const char *namespace,
>   			ndctl_namespace_foreach_safe(region, ndns, _n) {
>   				ndns_name = ndctl_namespace_get_devname(ndns);
>
> -				if (strcmp(namespace, "all") != 0
> -						&& strcmp(namespace, ndns_name) != 0)
> -					continue;
> +				if (strcmp(namespace, "all") == 0) {
> +					static const uuid_t zero_uuid;
> +					uuid_t uuid;
> +
> +					ndctl_namespace_get_uuid(ndns, uuid);
> +					if (!ndctl_namespace_get_size(ndns) &&
> +					    !memcmp(uuid, zero_uuid, sizeof(uuid_t)))
> +						continue;
> +				} else {
> +					if (strcmp(namespace, ndns_name) != 0)
> +						continue;
> +				}
> +
>   				switch (action) {
>   				case ACTION_DISABLE:
>   					rc = ndctl_namespace_disable_safe(ndns);
_______________________________________________
Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org
To unsubscribe send an email to linux-nvdimm-leave@lists.01.org

      parent reply	other threads:[~2020-04-06 11:41 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-03 21:05 Michal Suchanek
2020-04-06 11:39 ` Santosh Sivaraj
2020-04-06 11:41 ` Harish [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1fda4cb0-3ca7-3701-a2ad-fc99cec0432d@linux.ibm.com \
    --to=harish@linux.ibm.com \
    --cc=jack@suse.de \
    --cc=linux-nvdimm@lists.01.org \
    --cc=msuchanek@suse.de \
    --subject='Re: [PATCH] ndctl/namespace: skip zero namespaces when processing' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.